Standard Operating Procedures for the Use of Interoperability Resources in Oklahoma

8.2General Rules Governing the Use of Interoperability Resources

Plain language – Multi-jurisdictional communications shall be in plain language. Avoid using radio codes, acronyms and abbreviations as they may cause confusion between agencies. Additionally, it should be understood that plain words such as “help,” “assistance,” “repeat” and “backup” may have different operational meanings to different agencies. The word “help” should not be used alone unless in the context of a life-threatening situation.

Unit Identification - In multi-jurisdictional incidents, the jurisdiction’s name will precede the unit identifier. (For example, Oklahoma City Engine 10, Norman Engine 10, Edmond Car 10 or Lexington Car 2.)

8.3Shared channel/Talkgroup Rules of Use

For coordination during a police chase through multiple jurisdictions where the agencies have no other communications link with each other

For communications between multiple police agencies during extended joint operations, such as drug operations, riots, etc.

For coordination during recovery operations after a disaster, such as a tornado event when Federal, State and local officials require a common communications link

8.4National Mutual Aid Interoperability Channels Use

The table below identifies the proper uses of the VHF, UHF and National Public Safety Planning Advisory Committee (NPSPAC) (800 MHz) mutual aid channels.

Description	VHF	UHF	NPSPAC (800 MHz)
Hailing Channel	VCALL10	UCALL40 UCALL40D*	ICALL 8CALL90 ICALLD* 8CALL90D
Assigned per event	VTAC11	UTAC41 UTAC41D	ITAC1 8TAC91 ITACD 8TAC91D
Assigned per event	VTAC12	UTAC42 UTAC42D	ITAC2 8TAC92 ITAC2D 8TAC92D
Assigned per event	VTAC13	UTAC43 UTAC43D	ITAC3 8TAC93 ITAC3D 8TAC93D
Assigned per event	VTAC14		ITAC4 8TAC94 ITAC4D 8TAC94D
*The “D” in the Channel ID indicates the “direct” or “talk-around” mode, that is, non-repeater.

When using national mutual aid channels for communications, the agency should ensure the desired mutual aid channel is clear and available for assignment.

Below are procedures for the use of the national mutual aid CALL and TAC channels.

8.4.1Procedures for VCALL10, UCALL40 or ICALL/8CALL90

UCALL40 and ICALL/8CALL90 shall be left in the repeater Enabled mode.

Any radio user may hail on VCALL10, UCALL40 or ICALL/8CALL90.

It will be the responsibility of any dispatch center hearing a call to respond to the unit that is calling on the mutual aid CALL channel.

Dispatch centers with VCALL10, UCALL40 or ICALL/8CALL90 base stations are encouraged to monitor these channels at all times.

8.4.2Procedures for VTAC, UTAC and ITAC Channels

UTAC and ITAC repeaters should be in the repeater Disabled mode.

When a unit hails on a mutual aid CALL channel and it is determined that a large-scale mutual aid incident is going to take place or no other ITAC channel is appropriate or available, the dispatcher will advise the units involved to select a designated ITAC channel.

The dispatch center may enable any available UTAC or ITAC repeater as required for unit-to-unit communications.

When the incident is over or requires communications through another dispatch center, the dispatch center will disable the repeater.

The field unit notifies the dispatch center once the assigned UTAC or ITAC channel is no longer needed.

The dispatch center ensures the repeater is disabled and makes it available for the next assignment.

Direct or talk-around communications on a VTAC, UTAC, or ITAC channel may be used when two or more units are in close proximity to each other.

For an extended incident and as appropriate, the dispatcher assigning the mutual aid TAC channel(s) is responsible for notifying COMLs and affected dispatchers or agency communications centers that the mutual aid channel is in use.

Dispatcher Responsibilities – Disable the repeaters when the incident is done. When monitoring mutual aid channels, if units are heard communicating and there is a question of authorization, the dispatcher should request unit identification. If unauthorized communications are taking place, adjoining communications centers should be called to identify the users. Officer safety may be compromised if the channel(s) are inadvertently disabled or otherwise altered. If unauthorized traffic is being passed, the primary communications center can disable the repeater to halt its use. Follow-up activity by the communications center should ensure future unauthorized use is mitigated.

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